EP3894807A1 - Füllstandsmessgerät - Google Patents
FüllstandsmessgerätInfo
- Publication number
- EP3894807A1 EP3894807A1 EP19805610.3A EP19805610A EP3894807A1 EP 3894807 A1 EP3894807 A1 EP 3894807A1 EP 19805610 A EP19805610 A EP 19805610A EP 3894807 A1 EP3894807 A1 EP 3894807A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- waveguide
- semiconductor component
- encapsulation
- shf
- radar
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
- G01F23/22—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
- G01F23/28—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring the variations of parameters of electromagnetic or acoustic waves applied directly to the liquid or fluent solid material
- G01F23/284—Electromagnetic waves
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
- G01S13/88—Radar or analogous systems specially adapted for specific applications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
- G01S7/027—Constructional details of housings, e.g. form, type, material or ruggedness
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
- G01S7/03—Details of HF subsystems specially adapted therefor, e.g. common to transmitter and receiver
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/12—Supports; Mounting means
- H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
- H01Q1/225—Supports; Mounting means by structural association with other equipment or articles used in level-measurement devices, e.g. for level gauge measurement
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q13/00—Waveguide horns or mouths; Slot antennas; Leaky-waveguide antennas; Equivalent structures causing radiation along the transmission path of a guided wave
- H01Q13/02—Waveguide horns
Definitions
- field devices are generally used, which are used to record or influence process variables.
- the functionality of the field devices is based on suitable measuring principles in order to record the corresponding process variables, such as level, flow, pressure, temperature, pH value, redox potential or conductivity.
- process variables such as level, flow, pressure, temperature, pH value, redox potential or conductivity.
- a wide variety of such field device types are manufactured and sold by Endress + Hauser.
- Radar-based devices have been used to measure the fill level of containers
- a key advantage of radar-based measurement methods is the ability to quasi fill the level
- 26 GHz or 79 GHz measured.
- the higher the frequency band the narrower the beam cone of the radar signal.
- higher frequency bands are preferred in that a larger absolute frequency bandwidth can be used.
- 79 GHz for example
- Level measurement is possible, for example, with smaller connection flanges for attachment to the container. It is therefore desirable to check the level or
- Operate distance measurement generally also at frequencies higher than 79 GHz (up to radar frequencies of 300 GHz).
- High-frequency signals can be significantly attenuated even over short cable distances. For this reason, the efficient and reliable contacting of the semiconductor component using hybrid standard technologies is difficult with increasing frequency.
- semiconductor components are used to generate or receive radar signals above 100 GHz in particular, of which the electrical
- High-frequency signals are convertible. This means that hybrid signal routing is no longer necessary.
- the radar signals are decoupled or coupled in via an appropriate primary radiator.
- This is, for example, a planar antenna that is applied to the semiconductor component using micromechanical methods.
- Such a semiconductor device is used, among others, in
- the fill level measuring device can be made more compact overall.
- known circuit components can be implemented in the semiconductor component: in the case of FMCW, the high-frequency signal can be used for the radar signals to be transmitted are generated by means of a PLL (“phase locked loop”); The received radar signal can be mixed with the one to be transmitted
- High-frequency signal are mixed, so that the distance or level can be determined from the so-called difference frequency of the mixed signal.
- An appropriately designed evaluation block can determine the difference frequency, for example by means of an FFT (“Fast Fourier Transformation”) of the mixed signal.
- the radar signal cannot be radiated directly from the semiconductor component, at least in the case of level measurement, since the radiation from the primary radiator
- the invention is therefore based on the object of a radar-based
- the invention solves this problem by means of a radar-based level measuring device, which comprises at least the following:
- a dielectric waveguide which is preferably made of an insulation material with a dielectric value of greater than 1 (in particular HDPE or PTFE), the waveguide being contacted with the semiconductor component in such a way that the high-frequency signals as radar signals in
- An advantage of the fill level measuring device according to the invention is that the hermetic and... In particular due to the partial guidance of the radar signal in the waveguide
- the fill level measuring device according to the invention has the advantage that, in particular, the encapsulation spaced apart from the waveguide enables efficient coupling and decoupling of the radar signals without reducing the protection of the semiconductor component against thermal stress.
- the level measuring device can therefore be operated in an energy-efficient manner. Because of the implementation of the semiconductor device
- the level measuring device can be designed compactly without the
- the level meter can be designed flexibly depending on the area of application.
- the waveguide can be dimensioned with a length of at least 3 cm, in particular more than 8 cm, in order to thermally decouple the semiconductor component and any other electronics from the antenna.
- the coupling and decoupling of the radar signals can be further optimized if the encapsulation is designed so that the cavity between the
- Waveguide and the encapsulation has a distance of at least twice the wavelength of the radar signals.
- the waveguide can be fixed to the semiconductor component by an electromagnetic shielding of the circuit board inside the encapsulation encapsulation
- the semiconductor component is thus shielded and the waveguide is fixed by the same component. If the semiconductor component is arranged on a circuit board, the
- the producibility of the level measuring device can be simplified by designing the waveguide in two parts in such a way that the waveguide is in the region of the
- Shielding is divided into a first segment and a second segment.
- a possible housing of the fill level measuring device can be designed such that at least the semiconductor component, the waveguide and the encapsulation encapsulation are enclosed by the housing, the antenna having to be fastened outside the housing.
- a bushing For the coupling and decoupling of the radar signals between the inside of the housing and the outside, a bushing must accordingly be provided in the housing.
- Such an implementation can preferably be designed so that the
- Waveguide is fixed towards the antenna in such a way that the radar signals are coupled into the antenna or into the waveguide with little loss.
- the bushing can also be designed to be self-centering with respect to the waveguide.
- Fig. 1 A typical arrangement of a radar-based level meter on a container
- FIG. 1 For a basic understanding of the invention, a typical arrangement of a radar-based fill level measuring device 1 on a container 2 is shown in FIG. 1.
- the level measuring device 1 is connected to a higher-level unit 4, for example a process control system or a decentralized database, via a bus system, for example “Ethernet”, “PROFIBUS”, “HART” or “Wireless HART”.
- a bus system for example “Ethernet”, “PROFIBUS”, “HART” or “Wireless HART”.
- Level meter 1 are communicated. However, information about the fill level L can also be transmitted via the bus system in order to control any inflows or outflows at the container 2.
- the level measuring device 1 shown in FIG. 1 is designed as a freely radiating device, it comprises a corresponding antenna 12.
- the Antenna 12 is designed especially as a horn antenna at radar frequencies below 60 GHz.
- the antenna 12 is oriented such that radar signals SHF are emitted in the direction of the filling material 3.
- the radar signals SHF are reflected on the surface of the filling material 3 and, after a corresponding signal delay, by the antenna 12 of the
- Level meter 1 received as reflected radar signals EHF. Since the
- the opening angle of the beam cone, at which the radar signals SHF are transmitted, or at which the reflected radar signals EHF are received, depends not only on the dimensioning of the horn antenna 12, but also on the frequency of the radar signals SHF, EHF.
- a narrow opening angle reduces the risk of generating interfering reflections inside the container, which could be misinterpreted as a level echo.
- the frequency of the level of resolution that can potentially be achieved also depends on the frequency, at least if the level measuring device works using the FMGW method. Here too, the higher the frequency, the higher the potentially achievable resolution of the level value.
- FIG. 2 A schematic structure of the level measuring device according to the invention, which can operate at radar frequencies of more than 100 GHz and takes advantage of the associated advantages, is shown in FIG. 2:
- the core of the level measuring device 1 according to the invention is a semiconductor component 10, which, depending on the measuring principle implemented (FMGW or pulse transit time principle), can generate or process corresponding high-frequency signals SHF, eHF with frequencies up to 160 GHz or more.
- FMGW measuring principle implemented
- the high-frequency signal SHF to be transmitted is generated, for example, by means of an oscillator (for example designed as a “voltage controlled oscillator”), which is regulated by PLL (“phase locked loop”).
- an oscillator for example designed as a “voltage controlled oscillator”
- PLL phase locked loop
- the semiconductor component 10 on the receiving side can comprise a mixer for mixing the high-frequency signal SHF currently to be emitted with the currently received high-frequency signal e HF .
- This is used in order to be able to determine the distance d to the filling material 3 or the filling level L from the mixed signal in a corresponding circuit block of the semiconductor component 10, for example by means of an FFT (“Fast Fourier Transformation”) using the frequency of the mixed signal.
- FFT Fast Fourier Transformation
- the high-frequency component 1, the semiconductor component 10 is arranged on a circuit board 15.
- the power supply of the semiconductor component 10 and also any data transfer to the higher-level unit 4 takes place via the printed circuit board 15. Because the generation and processing of the high-frequency signals SHF, CHF takes place entirely on the semiconductor component 10, no high-frequency signals have to be led to the printed circuit board 15 . This eliminates lossy, hybrid connection lines.
- the semiconductor component 10 converts the high-frequency signals SHF into a radar signal SHF, for example via a primary radiator (not explicitly shown in FIG. 2)
- the cross-sectional shape (for example circular or rectangular) and the cross-sectional dimensions of the waveguide 11 a, b are to be adapted to the frequency or the desired mode of the radar signal SHF, RHF to be transmitted / coupled.
- the two edge lengths of the rectangle can, for example, be designed such that they have an edge length ratio of 2: 1.
- the first edge length can each be dimensioned with a third of the wavelength of the high-frequency signal SHF, RHF, the second edge length can be designed with 2/3 of the wavelength.
- the material of the waveguide must be chosen accordingly with regard to the dielectric constant. Since a dielectric constant of at least approximately 1.5 is advantageous for the waveguide, HDPE or PTFE in particular are suitable as the material for the waveguide 11 a, b.
- the encapsulation of the semiconductor component 10 is to be adapted so that between the
- Waveguide 1 1 a, b and the primary radiator a corresponding waveguiding contact is possible.
- a potting encapsulation can be used in which the surface of the primary radiator is left out.
- the semiconductor component 10 can thus be designed, for example, as a correspondingly modified DIP (“dual in-line package”) or QFN (“quad flat no leads package”) component.
- DIP dual in-line package
- QFN quad flat no leads package
- the waveguide 1 1 a, b is fixed in relation to the semiconductor component 10 in the exemplary embodiment of the fill level measuring device 1 according to the invention shown in FIG. 2 by means of a shield 16.
- the shield 16 is designed as a cap and is attached to the printed circuit board 15 in such a way that it covers the semiconductor device 10 on the circuit board 15. To achieve the shielding effect, it is necessary at least the
- the shield 16 can be made entirely of a metal, for example.
- a coated plastic substrate could also be used as a cap, in which the metallic coating is applied, for example, by PVD (“Physical Vapor Deposition”).
- PVD Physical Vapor Deposition
- a potting encapsulation 13 is arranged radially around the waveguide 11 a, b outside the shield 16. According to the invention, the waveguide 1 1 a, b is thereby encapsulated such that a defined cavity 14 is formed between the waveguide 1 1 a, b and the encapsulation encapsulation 13.
- the encapsulation 13 is structured such that it extends radially from the waveguide 1 1 a, b a distance r of at least that
- the encapsulation 13 can be structured, for example, by means of a corresponding encapsulation cup around the waveguide 11 a, b, which defines the structure of the encapsulation 13 during encapsulation.
- the encapsulation 13 also encloses the surface of the printed circuit board 15 facing away from the semiconductor component 10
- the outer surface 21 of the encapsulation 13, as shown in FIG. 2, can also be designed to be electromagnetically shielding in order to achieve improved electromagnetic compatibility.
- PVD Physical Vapor Deposition
- a separate, metallic casting cup can be used.
- the waveguide 1 1 a, b opens into a horn antenna 12.
- the horn antenna 12 is located on the outside of the housing 17 of the
- Level measuring device 1 in which the circuit board 15 with the semiconductor component 10, the waveguide 1 1 a, b and the shield 16 are housed.
- the waveguide 1 1 a, b towards the horn antenna 12 comprises the housing 17
- corresponding implementation 18 for the waveguide 1 1 a, b can also be designed in such a way that the waveguide 1 1 a, b is automatically centered during assembly.
- a window 19 is placed between the waveguide 11a, b and the horn antenna 12 at the level of the leadthrough 18 that is transparent to the radar signals SHF, EHF is. Accordingly, it can be made of a glass or a ceramic and can be fixed, for example, by gluing, welding or another melting joining process.
- the window 19 is preferably made of electrically non-suffering material with a dielectric value of greater than 1. In terms of strength, the window 19 should also ideally be designed so that it can withstand an absolute pressure of at least 100 bar.
- a filling 20 is introduced into the entire interior of the horn antenna 12.
- the filling 20 consists of an electrically insulating material. Due to the effect of the filling 20 as a dielectric, the design of the horn antenna 12 must be adapted accordingly to the dielectric.
- An advantage of the inventive guiding of the radar signals SHF, EHF between the semiconductor component 10 and the horn antenna 13 by means of the waveguide 11 a, b is that the distance between the circuit card 15 and the horn antenna 12 can be dimensioned as required.
- the waveguide can be dimensioned, for example, with a length of up to 8 cm or more, so that the electronic components on the circuit board are thermally corresponding to the climate in the Container 3 are decoupled.
- the waveguide 1 1 a, b can be constructed in two parts for the purpose of simplified modular production of different variants of the fill level measuring device 1 according to the invention.
- the waveguide 1 1 a, b is therefore divided at the level of the shield 16 into a first segment 1 1 a facing the semiconductor 10 and a second segment 1 1 b, that of the horn antenna 12 is facing.
- SHF unimpeded transmission of the radar signals
- EHF EHF along the resulting contact point between the
- Segments 1 1 1 a, 1 1 b it is advantageous if the segments 1 1 a, 1 1 b are connected to one another at least by a static contact pressure. It is also possible to glue this contact point with an adhesive which is transparent for the radar signals SHF, EHF.
- the waveguide 1 1 a, b can alternatively be designed with a curved course, preferably with a rectangular cross section. For this purpose, it is advantageous in the course of production if the waveguide 1 1 a, b is made from a flexible material.
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- General Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Computer Networks & Wireless Communication (AREA)
- Thermal Sciences (AREA)
- Fluid Mechanics (AREA)
- Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
- Radar Systems Or Details Thereof (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102018132285.2A DE102018132285A1 (de) | 2018-12-14 | 2018-12-14 | Füllstandsmessgerät |
| PCT/EP2019/081204 WO2020120059A1 (de) | 2018-12-14 | 2019-11-13 | Füllstandsmessgerät |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP3894807A1 true EP3894807A1 (de) | 2021-10-20 |
| EP3894807B1 EP3894807B1 (de) | 2023-01-11 |
Family
ID=68610208
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP19805610.3A Active EP3894807B1 (de) | 2018-12-14 | 2019-11-13 | Füllstandsmessgerät |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US11796375B2 (de) |
| EP (1) | EP3894807B1 (de) |
| CN (1) | CN113167630B (de) |
| DE (1) | DE102018132285A1 (de) |
| WO (1) | WO2020120059A1 (de) |
Families Citing this family (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102018122423A1 (de) * | 2018-09-13 | 2020-03-19 | Endress+Hauser SE+Co. KG | Vorrichtung zur Übertragung von Signalen aus einem zumindest teilweise metallischen Gehäuse |
| EP3971611A1 (de) * | 2020-09-17 | 2022-03-23 | VEGA Grieshaber KG | Radarmessgerät |
| DE102020129765A1 (de) * | 2020-11-11 | 2022-05-12 | Endress+Hauser SE+Co. KG | Füllstandsmessgerät |
| DE102020133194A1 (de) * | 2020-12-11 | 2022-06-15 | Endress+Hauser SE+Co. KG | Füllstandsmessgerät |
| DE102020133198B4 (de) * | 2020-12-11 | 2023-10-05 | Endress+Hauser SE+Co. KG | Hochfrequenz-Modul für ein Füllstandsmessgerät sowie Füllstandsmessgerät |
| DE102021118496A1 (de) * | 2021-07-16 | 2023-01-19 | Endress+Hauser SE+Co. KG | Füllstandsmessgerät |
| DE102021131690A1 (de) * | 2021-12-01 | 2023-06-01 | Endress+Hauser SE+Co. KG | Füllstandsmessgerät |
| EP4266013A1 (de) * | 2022-04-20 | 2023-10-25 | Rosemount Tank Radar AB | Radarfüllstandsmesssystem mit einer antennenanordnung mit einem nichtplastischen dielektrischen antennenkörper |
| EP4297181A1 (de) | 2022-06-20 | 2023-12-27 | VEGA Grieshaber KG | Dielektrischer wellenleiter zum propagieren von hochfrequenzwellen |
| EP4303609A1 (de) * | 2022-07-05 | 2024-01-10 | VEGA Grieshaber KG | Radarsensor und hf-adapter für einen radarsensor |
| DE102023200856A1 (de) | 2023-02-02 | 2024-08-08 | Vega Grieshaber Kg | Hochfrequenzeinheit, füllstandsmessvorrichtung und verfahren |
| US20250185179A1 (en) * | 2023-12-04 | 2025-06-05 | Blackberry Limited | Intrisically safe designed devices and methods therefor |
| DE102023134797A1 (de) * | 2023-12-12 | 2025-06-12 | Endress+Hauser SE+Co. KG | Füllstandsmessgerät |
| DE102024110019A1 (de) * | 2024-04-10 | 2025-10-16 | Endress+Hauser SE+Co. KG | Füllstandsmessgerät |
| DE102024114922A1 (de) | 2024-05-28 | 2025-12-04 | Vega Grieshaber Kg | Füllstandmessgerät |
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| US10072964B2 (en) * | 2014-12-18 | 2018-09-11 | Nectar, Inc. | Container fill level measurement and management |
| US9970806B2 (en) * | 2015-04-30 | 2018-05-15 | Rosemount Tank Radar Ab | Single conductor probe radar level gauge system and method for a tank having a tubular mounting structure |
| DE102015119690A1 (de) * | 2015-11-13 | 2017-05-18 | Endress + Hauser Gmbh + Co. Kg | Radarbasierter Füllstandsensor |
| US10247596B2 (en) * | 2016-01-28 | 2019-04-02 | Endress+Hauser SE+Co. KG | Level measurement device |
| DE102016120581A1 (de) * | 2016-10-27 | 2018-05-03 | Endress+Hauser Conducta Gmbh+Co. Kg | Messsonde und Verfahren zum, insbesondere im Wesentlichen gasblasenfreien, Befüllen eines Sondeninnenraums einer Messsonde |
| DE102017112894B4 (de) * | 2017-06-12 | 2019-06-13 | Silicon Radar GmbH | Hochfrequenz-Bauelement, insbesondere für Radar-Anwendungen |
| DE102017122600A1 (de) * | 2017-09-28 | 2019-03-28 | Te Connectivity Germany Gmbh | Verlustarme Steckverbindungsanordnung und System mit mindestens einer derartigen Steckverbindungsanordnung |
| ES2792043T3 (es) * | 2017-12-04 | 2020-11-06 | Grieshaber Vega Kg | Placa de circuitos impresos para un aparato de medición de nivel de llenado por radar con un acoplamiento de guía de ondas |
-
2018
- 2018-12-14 DE DE102018132285.2A patent/DE102018132285A1/de not_active Withdrawn
-
2019
- 2019-11-13 EP EP19805610.3A patent/EP3894807B1/de active Active
- 2019-11-13 US US17/413,758 patent/US11796375B2/en active Active
- 2019-11-13 CN CN201980078860.8A patent/CN113167630B/zh active Active
- 2019-11-13 WO PCT/EP2019/081204 patent/WO2020120059A1/de not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| EP3894807B1 (de) | 2023-01-11 |
| US11796375B2 (en) | 2023-10-24 |
| US20220049984A1 (en) | 2022-02-17 |
| WO2020120059A1 (de) | 2020-06-18 |
| CN113167630A (zh) | 2021-07-23 |
| CN113167630B (zh) | 2024-12-13 |
| DE102018132285A1 (de) | 2020-06-18 |
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